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GB/T 3478.8-2008 English PDF

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GB/T 3478.8-2008: Straight cylindrical involute splines - Metric module, side fit. 45-degreepressure angle M and W values
Status: Valid

GB/T 3478.8: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 3478.8-20081789 Add to Cart 13 days Straight cylindrical involute splines - Metric module, side fit. 45-degreepressure angle M and W values Valid
GB/T 3478.8-1995RFQ ASK 14 days Straight cylindrical involute splines 45 Degree pressure angle-- M and W values Obsolete

Similar standards

GB/T 1243   GB/T 3478.1   GB/T 3478.5   GB/T 3478.4   GB/T 3478.6   GB/T 3478.3   

Basic data

Standard ID: GB/T 3478.8-2008 (GB/T3478.8-2008)
Description (Translated English): Straight cylindrical involute splines - Metric module, side fit. 45-degreepressure angle M and W values
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J18
Classification of International Standard: 21.120.30
Word Count Estimation: 81,842
Date of Issue: 2008-09-22
Date of Implementation: 2009-05-01
Older Standard (superseded by this standard): GB/T 3478.8-1995
Quoted Standard: GB/T 321; GB/T 3478.1
Regulation (derived from): National Standard Approval Announcement 2008 No.16 (Total No.129)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the pressure angle of 45 �� Straight cylindrical involute splines M value (bar spacing MRi, cross bar from MRe) and W values ??(average external splines normal line length) is calculated and limits the size of the table. This section applies to both GB/T 3478. 1 design and manufacture of pressure angle of 45 �� involute splines.

GB/T 3478.8-2008: Straight cylindrical involute splines - Metric module, side fit. 45-degreepressure angle M and W values


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Straight cylindrical involute splines.Metric module, side fit.45-degreepressure angle M and W values ICS 21.120.30 J18 National Standards of People's Republic of China Replacing GB/T 3478.8-1995 Straight cylindrical involute splines (Metric series of teeth with the side) Part 8. 45 ° pressure angle M and W values 2008-09-22 released 2009-05-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released

Foreword

GB/T 3478 "cylindrical straight teeth involute spline (metric series of teeth with the side)" is divided into nine parts. - Part 1. General; - Part 2. 30 ° pressure angle dimension table; - Part 3. 37.5 ° pressure angle dimension table; - Part 4. 45 ° pressure angle dimension table; - Part 5. Inspection; - Part 6. 30 ° pressure angle M and W; - Part 7. 37.5 ° Pressure angle M and W; - Part 8. 45 ° pressure angle M and W; Part 9. Measuring rods. This part is part 8 of GB/T 3478. This part refers to ISO 4156-2..2005 "Cylindrical Straight Tooth Spline Spline (Metric Modulus Tooth Side) Part 2. Dimensions" About 45 ° pressure angle M value and W value, is the GB/T 3478.8-1995 "cylindrical straight teeth involute spline 45 ° pressure angle M value and W value "revision. The main differences between this part and GB/T 3478.8-1995 are as follows. --- standard name from the "cylindrical straight teeth involute spline 45 ° pressure angle M value and W value" to "cylindrical straight involute spline (m Modular tooth side mating) Part 8. 45 ° pressure angle M value and W value "; --- modified the original standard of the error, according to GB/T 1.1 made editorial changes. This part of the national machinery shaft and accessories standardization technical committee put forward and centralized. This part of the drafting unit. in the machine productivity promotion center, Harbin Dongan engine manufacturing company, Shijiazhuang sprocket factory, China second Machinery Group Corporation, Taiyuan Heavy Industry Co., Ltd. This part of the main drafters. Ming Cui new, often treasure India, Xu Wenjiang, Tan Ren Wan, Wang Xiaoling, Deng Gao see. This part of the previous version of the standard to replace the release of the situation. --- GB/T 3478.8-1995. Straight cylindrical involute splines (Metric series of teeth with the side) Part 8. 45 ° pressure angle M and W values

1 Scope

This part of GB/T 3478 specifies the M value of the involute spline of the cylindrical straight teeth with a pressure angle of 45 ° (rod spacing MRi, MRe) and W value (the average length of the spline normal line) and the limit size table. This part is applicable to involute splines with a pressure angle of 45 ° designed and manufactured according to GB/T 3478.1.

2 normative reference documents

The terms of this document are the terms of this part by reference to this part of GB/T 3478. Any reference to the date of the text , All subsequent amendments (excluding corrigenda) or revisions do not apply to this part, however, encouragement under this section The parties to the agreement study whether the latest versions of these files are available. For undated references, the latest edition of this document applies section. GB/T 321 priority and priority series GB/T 3478.1 Cylindrical straight teeth involute splines (metric series of teeth with side) Part 1. General (GB/T 3478.1- 2008, ISO 4156-1..2005, MOD)

3 bar measurement of the size of the formula

Note. Allow the corresponding steel ball instead of the bar. 3.1 The formula for measuring the size of the measuring bar at the time of involute opening Figure 1 D'Ri = Db [tanαci-tan (αci-EmaxD + invαci-inv45 ° )] (1) Where. D'Ri - the calculated diameter of the bar; Αci - the pressure angle on the spline and the rod contact point, expressed in radians, αci = cos-1 Db Dci Dci --- internal spline and measuring rod at the point of contact diameter. Dci = Deemax + Dimin2 Deemax --- the maximum size of the external spline; Dimin --- minimum value of internal spline trails; Emax --- the actual maximum cogging width, the table by the tolerance level of 7 values. Invαci = tanαci-αci; Inv45 ° = 0.2146018. The rod diameter DRi is selected according to R40 in GB/T 321. If D'Ri is not the R40 series value, it should be selected to be the closest to D'Ri The value. Figure 2 Even teeth. MRimax = Dbcosαimax- DRi (2) MRimin = Dbcosαimin- DRi (3) Odd teeth. MRimax = Dbcosαimax × Cos90 ° z-DRi (4) MRimin = Dbcosαimin × Cos90 ° z-DRi (5) Where. MRimax --- the maximum value of the spline bar spacing; MRimin - the minimum value of the spline bar spacing; Αimax --- When E is Emax, the internal pressure on the center circle of the pressure bar. Invαimax = Emax D + inv45 ° - DRi Db Αimin --- When E is Emin, the internal pressure on the center circle of the internal pressure bar. Invαimin = Emin D + inv45 ° - DRi Db DRi - internal spline bar diameter. 3.2 Calculation formula of measuring the size of the bar when the spline tooth is straight Figure 3 D'Ri = D [sin45 ° -cos45 ° × tan (45 ° -EmaxD )] (6) Figure 4 Even teeth. MRimax = Dsin (βs2 + Emax ) -DRi Sinβs2 -DRi (7) MRimin = Dsin (βs2 + Emin ) -DRi Sinβs2 -DRi (8) Odd teeth. MRimax = Dsin (βs2 + Emax ) -DRi Sinβs2 × cos90 ° z-DRi (9) MRimin = Dsin (βs2 + Emin ) -DRi Sinβs2 × cos90 ° z-DRi (10) Where. Βs is the cogging angle, βs = 90 ° - 180 ° 3.3 Calculation formula for measuring the size of external spline bar Figure 5 D'Re = Db [tan (αce + invαce + π z - Smin D -inv45 ° ) -tanαce] (11) Where. Αce - the pressure angle on the outer spline and the rod contact point, expressed in radians, αce = cos-1 Db Dce Dce --- outside the splines and measuring rods at the point of contact. Dce = Deemax + Dimin Smin --- the actual minimum tooth thickness, the table by tolerance level 7 and the basic deviation of h value. Invαce = tanαce-αce. The rod diameter DRe is selected according to R40 in GB/T 321. If D'Re is not the R40 series value, it should be selected to be closest to D'Re The value. Figure 6 Even teeth. MRemin = Dbcosαemin + DRe (12) MRemax = Dbcosαemax + DRe (13) Odd teeth. MRemin = Dbcosαemin × Cos90 ° z + DRe (14) MRemax = Dbcosαemax × Cos90 ° z + DRe (15) Where. MRemin - the minimum value of the spline span of the spline; MRemax - the maximum value of the spline span between the outer splines; Αemin --- When S is Smin, the pressure angle on the center circle of the external spline bar. Invαemin = DRe Db + inv45 ° + Smin D - Αemax - when S is Smax, the pressure angle on the center circle of the external spline bar. Invαemax = DRe Db + inv45 ° + Smax D - DRe - outside the spline with the diameter of the rod. 4 The formula for the average length W of the male and female splines (see Figure 7) Figure 7 Wmax = Wmin + Tcos45 = Wmin + 0.707T (17) Where. Wmin --- the average length of the common line of the minimum; Wmax --- the maximum length of the average length of the common law; K - number of teeth, K = 0.25 z + 0.5 (take integer); (T + λ) --- total tolerance; T --- processing tolerances; Esv --- the role of tooth thickness on the deviation.

5 bar measurement size

5.1 The spline teeth are involute for measuring the size of the bar as follows. Modulus of 0.25mm ~ 2.5mm, the number of teeth 10 to 100, the tolerance level of 4 to 7, the basic deviation of the amount of h h key measurement Rod diameter DRi, rod maximum distance MRimax and minimum value MRimin see Table 1 to Table 9. 5.2 The internal spline teeth are measured in straight line with the diameter of the rod diameter DRi, the maximum rod distance MRimax and the minimum value MRimin, see Table 10 to Table 18. 5.3 The measuring bar of the external spline is as follows. 5.3.1 External spline measurement with modulus of 0.25mm ~ 2.5mm, number of teeth 10 ~ 100, tolerance level of 4 ~ 7, basic deviation h The diameter of the rod diameter DRe, the minimum value of the span between the MRemin and the maximum value MRemax see Table 19 to Table 27. 5.3.2 When the basic deviation of the spline is not h, the span distance shall be calculated according to the formula listed in 3.3.2 or calculated as follows After the difference ΔMRe, the span value in the table is corrected. ΔMRe = Ke · esv (18) Where. Ke --- transform coefficients, see Table 19 to Table 27. 5.4 The rod diameter DRi and DRe listed in Tables 1 to 27 are determined in accordance with 3.1.1 and 3.2.1 and 3.3.1. If necessary, on the bar Make a plane to avoid contact with the spline trails. 5.5 When the actual diameter of the rod is different from the diameter listed in the standard, the maximum value of the spline bar spacing MRimax and the minimum value MRimin, the minimum value of the spline span distance MRemin and the maximum value MRemax, should be calculated according to the actual rod diameter.

6 km normal length W limit value

6.1 Modulus 0.25mm ~ 2.5mm, the number of teeth 10 ~ 100, the tolerance level is 4 ~ 7, the basic deviation of h outside the spline common to the average Length W limit, see Table 28 to Table 36. 6.2 When the basic deviation of the external spline tooth thickness is not h, the difference ΔW of the average length of its common line is calculated as follows. ΔW = esv · cos 45 ° = 0.707esv (19) Number of teeth Measuring rods diameter DRi Emin and Emax Rod Distance MRi 4H 5H 6H 7H Min max min max min max min max 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 1.376 1.617 1.900 2.137 2.412 2.649 2.920 3.077 3.346 3.584 3.851 4.090 4.355 4.594 4.858 5.098 5.361 5.499 5.760 6.002 6.263 6.505 6.765 7.007 7.266 7.509 7.768 8.011 8.269 8.512 8.770 9.014 9.271 9.515 9.772 10.016 10.273 10.517 10.774 11.018 11.275 11.519 11.776 12.020 12.276 12.521 1.391 1.631 1.913 2.149 2.425 2.661 2.932 3.089 3.358 3.596 3.863 4.102 4.367 4.606 4.870 5.110 5.372 5.510 5.772 6.013 6.274 6.516 6.776 7.018 7.278 7.520 7.779 8.022 8.281 8.524 8.782 9.025 9.283 9.527 9.784 10.028 10.285 10.529 10.786 11.030 11.286 11.531 11.787 12.032 12.288 12.533 1.383 1.624 1.906 2.143 2.418 2.654 2.926 3.083 3.352 3.590 3.857 4.096 4.361 4.600 4.864 5.104 5.366 5.504 5.766 6.008 6.269 6.510 6.771 7.013 7.272 7.515 7.774 8.017 8.275 8.518 8.776 9.020 9.277 9.521 9.778 10.022 10.279 10.523 10.780 11.025 11.281 11.526 11.782 12.026 12.282 12.527 1.408 1.647 1.928 2.164 2.439 2.675 2.946 3.103 3.372 3.610 3.877 4.116 4.381 4.620 4.884 5.124 5.386 5.525 5.787 6.028 6.289 6.531 6.791 7.033 7.293 7.535 7.794 8.037 8.295 8.539 8.797 9.040 9.298 9.541 9.799 10.043 10.300 10.544 10.801 11.045 11.301 11.546 11.802 12.047 12.303 12.548 1.393 1.633 1.915 2.152 2.427 2.663 2.934 3.091 3.360 3.598 3.865 4.104 4.369 4.608 4.872 5.112 5.375 5.513 5.775 6.016 6.277 6.519 6.779 7.021 7.281 7.523 7.782 8.025 8.284 8.527 8.785 9.028 9.286 9.530 9.787 10.031 10.288 10.532 10.789 11.033 11.290 11.534 11.790 12.035 12.291 12.536 1.434 1.670 1.951 2.186 2.461 2.697 2.968 3.125 3.394 3.632 3.899 4.137 4.402 4.641 4.905 5.145 5.408 5.546 5.808 6.050 6.311 6.552 6.813 7.055 7.314 7.557 7.816 8.059 8.317 8.560 8.819 9.062 9.320 9.564 9.821 10.065 10.322 10.566 10.823 11.067 11.324 11.568 11.825 12.069 12.325 12.570 1.410 1.649 1.930 2.166 2.441 2.677 2.948 3.105 3.374 3.612 3.879 4.117 4.382 4.622 4.885 5.125 5.388 5.526 5.788 6.030 6.291 6.532 6.793 7.035 7.294 7.537 7.796 8.039 8.297 8.540 8.799 9.042 9.300 9.543 9.801 10.045 10.302 10.546 10.803 11.047 11.304 11.548 11.804 12.049 12.305 12.550 1.474 1.708 1.988 2.222 2.497 2.732 3.003 3.161 3.430 3.667 3.934 4.172 4.437 4.677 4.940 5.180 5.443 5.582 5.844 6.085 6.346 6.588 6.849 7.091 7.350 7.593 7.852 8.095 8.354 8.597 8.855 9.099 9.356 9.600 9.858 10.102 10.359 10.603 10.860 11.104 11.361 11.606 11.862 12.107 12.363 12.608 Table 1 (continued) The unit is in millimeters Number of teeth Measuring rods diameter DRi Emin and Emax Rod Distance MRi 4H 5H 6H 7H Min max min max min max min max 0.67 0.67 0.67 0.67 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71 12.777 13.022 13.277 13.523 13.679 13.924 14.179 14.425 14.680 14.926 15.180 15.426 15.681 15.927 16.181 16.427 16.682 16.928 17.182 17.428 17.683 17.929 18.183 18.429 18.683 18.930 19.184 19.430 19.684 19.931 20.184 20.431 20.685 20.931 21.185 21.432 21.685 21.932 22.186 22.433 22.686 22.933 23.186 23.433 23.686 12.788 13.033 13.289 13.534 13.690 13.936 14.191 14.437 14.692 14.937 15.192 15.438 15.693 15.938 16.193 16.439 16.693 16.940 17.194 17.440 17.694 17.941 18.195 18.441 18.695 18.941 19.195 19.442 19.696 19.942 20.196 20.443 20.696 20.943 21.197 21.443 21.697 21.944 22.197 22.444 22.697 22.944 23.198 23.445 23.698 12.783 13.028 13.284 13.529 13.685 13.931 14.186 14.431 14.686 14.932 15.187 15.433 15.687 15.933 16.188 16.434 16.688 16.934 17.189 17.435 17.689 17.936 18.190 18.436 18.690 18.937 19.190 19.437 19.691 19.937 20.191 20.438 20.691 20.938 21.192 21.439 21.692 21.939 22.192 22.439 22.693 22.940 23.193 23.440 23.693 12.803 13.049 13.304 13.549 13.706 13.951 14.206 14.452 14.707 14.953 15.208 15.453 15.708 15.954 16.209 16.455 16.709 16.955 17.210 17.456 17.710 17.956 18.210 18.457 18.711 18.957 19.211 19.458 19.712 19.958 20.212 20.459 20.712 20.959 21.213 21.460 21.713 21.960 22.213 22.460 22.714 22.961 23.214 23.461 23.714 12.792 13.037 13.292 13.538 13.694 13.939 14.195 14.440 14.695 14.941 15.196 15.442 15.696 15.942 16.197 16.443 16.698 16.944 17.198 17.444 17.698 17.945 18.199 18.445 18.699 18.946 19.200 19.446 19.700 19.947 20.201 20.447 20.701 20.948 21.201 21.448 21.702 21.949 22.202 22.449 22.702 22.950 23.203 23.450 23.703 12.826 13.071 13.327 13.572 13.729 13.974 14.229 14.475 14.730 14.976 15.231 15.477 15.731 15.977 16.232 16.478 16.733 16.979 17.233 17.479 17.734 17.980 18.234 18.481 18.735 18.981 19.235 19.482 19.736 19.982 20.236 20.483 20.736 20.983 21.237 21.484 21.737 21.984 22.238 22.485 22.738 22.985 23.238 23.486 23.739 12.806 13.051 13.307 13.552 13.708 13.954 14.209 14.455 14.710 14.956 15.210 15.456 15.711 15.957 16.212 16.458 16.712 16.958 17.213 17.459 17.713 17.960 18.214 18.460 18.714 18.961 19.215 19.461 19.715 19.962 20.216 20.463 20.716 20.963 21.217 21.464 21.717 21.964 22.218 22.465 22.718 22.965 23.218 23.465 23.719 12.864 13.109 13.365 13.610 13.767 14.012 14.268 14.513 14.768 15.014 15.269 15.515 15.770 16.016 16.271 16.517 16.771 17.018 17.272 17.519 17.773 18.019 18.274 18.520 18.774 19.021 19.275 19.521 19.775 20.022 20.276 20.523 20.777 21.023 21.277 21.524 21.778 22.025 22.278 22.525 22.779 23.026 23.279 23.526 23.780 Number of teeth Measuring rods diameter DRi Emin and Emax Rod Distance MRi 4H 5H 6H 7H Min max min max min max min max 1.12 1.12 1.12 1.12 1.12 1.12 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 2.986 3.456 4.015 4.483 5.031 5.501 5.883 6.356 6.893 7.368 7.901 8.377 8.906 9.384 9.911 10.390 10.915 11.217 11.741 12.223 12.744 13.227 13.747 14.231 14.750 15.234 15.752 16.237 16.754 17.240 17.756 18.242 18.757 19.244 19.759 20.246 20.760 21.248 21.761 22.250 22.762 23.251 23.763 24.253 24.764 25.254 3.004 3.473 4.032 4.499 5.048 5.517 5.900 6.372 6.909 7.384 7.917 8.393 8.922 9.400 9.927 10.406 10.930 11.233 11.756 12.238 12.760 13.242 13.763 14.246 14.765 15.250 15.767 16.253 16.769 17.255 17.771 18.258 18.773 19.260 19.774 20.262 20.775 21.263 21.777 22.265 22.778 23.267 23.779 24.268 24.780 25.269 2.993 3.462 4.021 4.489 5.038 5.507 5.889 6.363 6.900 7.374 7.907 8.383 8.913 9.391 9.917 10.397 10.921 11.224 11.747 12.229 12.751 13.234 13.754 14.237 14.756 15.241 15.759 16.244 16.761 17.247 17.762 18.249 18.764 19.251 19.766 20.253 20.767 21.255 21.768 22.257 22.770 23.259 23.771 24.260 24.772 25.261 3.024 3.492 4.050 4.518 5.066 5.535 5.918 6.390 6.927 7.402 7.934 8.410 8.940 9.418 9.944 10.423 10.948 11.251 11.774 12.256 12.778 13.261 13.781 14.264 14.783 15.268 15.786 16.271 16.788 17.274 17.789 18.276 18.791 19.278 19.793 20.280 20.794 21.282 21.795 22.284 22.797 23.285 23.798 24.287 24.799 25.288 3.003 3.472 4.031 4.498 5.047 5.516 5.899 6.372 6.909 7.383 7.916 8.392 8.922 9.400 9.927 10.406 10.931 11.233 11.756 12.239 12.760 13.243 13.763 14.247 14.766 15.250 15.768 16.253 16.770 17.256 17.772 18.259 18.774 19.261 19.776 20.263 20.777 21.265 21.778 22.267 22.780 23.269 23.781 24.270 24.782 25.272 3.054 3.520 4.078 4.544 5.092 5.561 5.945 6.417 6.954 7.428 7.961 8.437 8.967 9.444 9.971 10.450 10.975 11.278 11.801 12.283 12.805 13.288 13.808 14.292 14.811 15.295 15.813 16.298 16.815 17.301 17.817 18.304 18.819 19.306 19.820 20.308 20.822 21.310 21.823 22.312 22.825 23.314 23.826 24.315 24.827 25.317 3.020 3.488 4.046 4.513 5.062 5.531 5.914 6.387 6.924 7.398 7.931 8.407 8.937 9.414 9.941 10.421 10.945 11.248 11.772 12.254 12.775 13.258 13.778 14.262 14.781 15.266 15.784 16.269 16.786 17.272 17.788 18.274 18.790 19.277 19.791 20.279 20.793 21.281 21.794 22.283 22.796 23.285 23.797 24.287 24.798 25.288 3.102 3.566 4.123 4.589 5.137 5.605 5.989 6.461 6.998 7.472 8.005 8.481 9.011 9.488 10.015 10.494 11.019 11.323 11.846 12.328 12.850 13.333 13.853 14.337 14.856 15.340 15.858 16.344 16.861 17.347 17.863 18.350 18.865 19.352 19.867 20.354 20.868 21.357 21.870 22.359 22.872 23.361 23.873 24.362 24.874 25.364 Table 2 (continued) Units in millimeters Number of teeth Measuring rods diameter DRi Emin and Emax Rod Distance MRi 4H 5H 6H 7H Min max min max min max min max 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32 1.32......
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